The National Autonomous University of Mexico is a public research university in Mexico. A portion of Ciudad Universitaria is a UNESCO World Heritage site that was designed and decorated by some of Mexico's best-known architects and painters of the 20th century. The campus also hosted the main events of the 1968 Summer Olympic Games. All Mexican Nobel laureates are alumni or faculty of UNAM. UNAM is known for its rigorous admissions, with acceptance rates often under 10%. Its research and education are also globally recognized for their excellence and impact. UNAM was founded, in its modern form, on 22 September 1910 by Justo Sierra as a secular alternative to its predecessor, the Royal and Pontifical University of Mexico. UNAM was also the birthplace of the student movement of 1968.